On June 23, 1997 - barely three weeks after her 18th birthday - Kristen Modafferi, a tall, vivacious brunette, ended her workday and vanished into thin air. An investigation into her disappearance has yet to produce a trace.
Matt Birkbeck (born Brooklyn, N.Y.) is a bestselling author and journalist. His debut work of fiction, The Wicked, was published in August 2025.
He is best known for his nonfiction books A Beautiful Child, which told the tragic story of "Sharon Marshall" and Franklin Delano Floyd, and the sequel Finding Sharon, which is a memoir about his ten-year effort, along with the FBI and National Center for Missing & Exploited Children, to find Sharon's true identity.
Both books were adapted by Netflix for the hit 2022 film Girl in the Picture, which Matt served as executive producer.
He is also known for The Life We Chose, about William "Big Billy" D'Elia, the former head of the Bufalino crime family; Deconstructing Sammy, about the life of Sammy Davis, Jr. and efforts to resolve his debts and his legacy; The Quiet Don, about Mafia boss Russell Bufalino; and A Deadly Secret, about New York real estate scion Robert Durst, who was accused of murdering his wife Kathie Durst and two others. A Deadly Secret was adapted in 2017 by Lifetime for the film The Lost Wife of Robert Durst.
He has also authored magazine pieces and features for Boston Magazine, Philadelphia Inquirer, The New York Times, Reader's Digest, Playboy and others, and was a correspondent for People magazine focusing on crime and human interest stories.